fix: support smtp server with port 465

common/email.go

@@ -1,6 +1,7 @@
 package common
 
 import (
+	"crypto/tls"
 	"fmt"
 	"net/smtp"
 	"strings"
@@ -15,6 +16,47 @@ func SendEmail(subject string, receiver string, content string) error {
 	auth := smtp.PlainAuth("", SMTPAccount, SMTPToken, SMTPServer)
 	addr := fmt.Sprintf("%s:%d", SMTPServer, SMTPPort)
 	to := strings.Split(receiver, ";")
-	err := smtp.SendMail(addr, auth, SMTPAccount, to, mail)
+	var err error
+	if SMTPPort == 465 {
+		tlsConfig := &tls.Config{
+			InsecureSkipVerify: true,
+			ServerName:         SMTPServer,
+		}
+		conn, err := tls.Dial("tcp", fmt.Sprintf("%s:%d", SMTPServer, SMTPPort), tlsConfig)
+		if err != nil {
+			return err
+		}
+		client, err := smtp.NewClient(conn, SMTPServer)
+		if err != nil {
+			return err
+		}
+		defer client.Close()
+		if err = client.Auth(auth); err != nil {
+			return err
+		}
+		if err = client.Mail(SMTPAccount); err != nil {
+			return err
+		}
+		receiverEmails := strings.Split(receiver, ";")
+		for _, receiver := range receiverEmails {
+			if err = client.Rcpt(receiver); err != nil {
+				return err
+			}
+		}
+		w, err := client.Data()
+		if err != nil {
+			return err
+		}
+		_, err = w.Write(mail)
+		if err != nil {
+			return err
+		}
+		err = w.Close()
+		if err != nil {
+			return err
+		}
+	} else {
+		err = smtp.SendMail(addr, auth, SMTPAccount, to, mail)
+	}
 	return err
 }